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Old 06-28-2011, 06:13 PM   #1 (permalink)
MCB Member
y0da900's Avatar
Join Date: Oct 2007
Location: Plattsburgh, NY

Closed bolt Ion XE / Vibe conversion kits are ready

XE kits now available

This valve system is the same operational concept as the one being used in the MCB open source group project. Main purpose of the kit - efficiency. Tests indicate that anywhere from 1,600 - 2,300+ shots per tank is achievable. The low end on that scale is from mechanical conversions without a QEV and a slight overbore, the high end is electro conversions (no QEV) and mech conversions using a QEV and bore matched paint.

As indicated, the system can operate mechanically or electronically. The firing piston seals the dump chamber immediately before firing, nothing required for mechanical operation other than a normally open 3-way valve such as the Clippard SMAV-3 - which is often found in Ion mechanical conversions.

The only permanent mod needing to be done to the Ion is a channel cut into the bottom of the body to allow a hose to reach to the back outside of the frame. A hole can also be drilled into the frame for the hose relocation as well. No tapping is required. All other components lock in place with no modifications.

The conversion kit works on Ion XEs, Vibes, and compatible. The stock board works for electro conversions - but the eyes are not functional. Third party closed bolt boards are required for eyes with the electro conversion. With the stock board, the dwell acts as a ball in place delay as it is not important to the firing sequence and has no impact on efficiency or velocity - just how long the bolt is open. Force feed loaders are recommended.

I have some XE/Vibe compatible kits ready to go with more on the way. The spacer between the power tube and the rear plug is unmilled, and acts like a spacer in an Epiphany - isolating excess volume to allow you to gain efficiency and raise the peak ROF by increasing the pressure. Spacers that are milled allow full access to the dump chamber to drop pressure and create a quieter/smoother shot.

Price for an XE/Vibe conversion kit is $80 shipped as shown with an unmilled spacer plus all of the fittings needed, o-ring rebuild set, and new tubing. $85 shipped for a kit with a milled spacer that allows the entire volume of the dump chamber to be accessed. $95 shipped for a kit with both a milled and an unmilled spacer so you can choose quiet or peak efficiency. All kits are tested before shipping to verify that they are working properly.

Kits can be run mechanically or electronically.

And the layout marks have been cleaned off since these pictures were taken

An animation I did of the first generation prototype Ion conversion kit.

A video of some shooting of the prototype.

MCB community project 1- Closed Bolt Spool Valve

Original PBN thread

Kits are also available in the members only BST at a discounted members price.

Last edited by y0da900; 06-29-2011 at 11:10 PM.
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